Thanks Malcolm, I'll try to sort out the pressure plate issue by shooting a test roll. As I said, the lens apparently didn't suffer any drop or similar cases of mechanical shock whatsoever according to the original owner, besides of that they guys at the lab didn't find any issue testing the lens and body using their computer system. However, I doubt the kinds of problems related to pressure plate misalignments or similar can be detected by an electronical testing.
Regards, Alex Z -----Original Message----- From: [EMAIL PROTECTED] [mailto:owner-eos@;a1.nl]On Behalf Of Malcolm Stewart Sent: Tuesday, November 05, 2002 11:35 PM To: [EMAIL PROTECTED] Subject: Re: EOS SOS ! ----- Original Message ----- From: Kotsinadelis, Peter (Peter) <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, November 05, 2002 9:14 PM Subject: RE: EOS SOS ! > Alex Zabrovsky wrote: > > ...about the 20-30% of the left part of the prints shows unsharp, washed out > image part, while the rest (center and all the way towards right side) is > tack sharp. > ----------------------------------------------- > > Alex, > > Shoot a roll of slides and see if it does the same. May be your pressure > plate in the rear door. > > Peter K For Alex, If it is a pressure plate problem, it will be more apparent with your lens at the wide-angle end (less depth of focus [as opposed to depth of field] ) and it may depend on whether you're using continuous drive mode at ~5fps. If it's a static effect you should be able to see the effect (with a film loaded) by removing the lens and opening the shutter on B and looking into the camera's throat. Assuming your observations are correct you'll see a big difference in flatness/curvature between left and right sides of the aperture. However I would be surprised if a lightly used EOS3 suffers from this defect - it's a relatively new camera design and as far as I recall, both Canon & Nikon sorted out film flatness under motor drive conditions some years ago. I wonder if the 28-135 IS has suffered a drop? Malcolm Milton Keynes, UK * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
